Method for controlling weft ends in weft replenishing looms



1931- I R. G. TURNER 1,334,357

METHOD FOR CONTROLLING WEFT ENDS IN WEFT REPLENISHING LbOMS Filed Aug. 28. 1930 JAN/ENTER FIG. 5

.-. R/CHARU QTURNH? f-wzflf M AITDPNEYS TF5 after-tyingthe weft'ends of'two bobbinsto Patented Dec. 1, 1931 UNITED f STATES ,PORATION or MASSACHUSETTS.

1P A ria: r oF' ion;v

nroimnn GRE NL EAF' TURNER, or woncnsrnn, iuhsshcirirsnr'rs, ASsIGNOR I'ro CROMPTON a KNOWLES Loo1vr WORKS,

or ,woncnsrn t, irAssAc UsErrscon .MErHonroR CONTROLLING wnr'r runs In: nrsi nninsnme Looris a Application filed aug stesjisso; Seria1N0.478.423."

I This invention relatesto improvements in the method of controlling weft ends-extending from reserve bobbins held in a magazine and it is the general object of the invention,

gether, to act on the ends in such a way asto prevent the knot'between them from being drawn into the cloth. 'iln-my' prior Patent No. 1,756,709'1 have shown the method of controlling weft lends which consists intying the threads of two bcbbins togetheriso that when oneis trans ferred theEotlier will-act'as a threadholder therefor. The invention as set forth in that patent has been successfully practiced in connection with fabrics which have a relatively coarse ground .weave to support apile'surface and in such use there was noneed for preventing the knot from entering the shed, the

principal concern being to have the knot as small as possible. In theproduction of finer fabrics, however, it isusualpractiee to have as few-knots as possible in the weft threads andit is accordingly an important object of my present invention toprovide a method for acting on theti'ed weft ends'which will cause a bend or similar deformationinsaid ends soz dispose d as to holdifthe knot out of the cloth when the second of a pair of bobbins is transferred. It is. of'courseimportant to prevent theknot from being drawn 'intothe cloth when the first of a pair of bobbins is transferred, but this can ordinarily be easily accomplished because the distance from the magazine to the adjacent selvage is generally longer than the distance-froin the knot to either bobbin measured along theweft ends. VVith-these and other objects in :view;which willap'pear as the descriptionproceeds, my

invention resides in the combination and arset forth in the claims. I

I In'the accompanying drawings, wherein a convenient embodiment of my invention is setforth, t a Fig. 1 is a diagrammatic "vertical section through a magazine such'as may be employed topractice my present method, Fig. 2 is a front 'view'of the structure shown rangement of parts hereinafter, described and n Fig.1,

upper and lowerbobbins of each-pair are designatedat-B andB respectively. w

A Located near the bottom of the magazinematic: views showing; the manner in which my method is employed, and v 1: L *Fig. 6 is a detail'of a device which-prevents the knot from beingdrawn into-' the sheds nRefe'rring tosFigssl and 2, I have shown a magazine .M having a guideway' 10. down 1 which reserve bobbins 'maymove by gravity toward a dischargeopening 11 A yielding gate or door 12 may be uscd so that the lowest bobbin may be movedbya transferrer 131into a'depleted shuttleQlt; YThe-bobbins are arranged in pairs and the weft ends'ofthe is a weft'end engaging device comprising an uprightpost15 having-securedthereto a bent wire 16 formed with. an'upwardlyaiid forwardly inclined. portion 17 terminating in a hook- 18. The parts. described "may; be rela'ted as shown in Fig. 3 and the invention may be practiced l in connection with a set of: warps W which are incorporated into L. clothYC at .the' fell-F, the cloth having a selvage S. v I In-carrymg my invention into effect the reserve bobbins are placed in the guideway 10 :in pairswith their tip ends preferably,- though not necessarily, pointed-away from the-selvage. The weft end E of each bobhave. their weft ends attached in pairs.- The point of junction between the weft" ends is designated at 19 and may be a knot or any other type ofunion between the threads."- lhe designate anymode of attachment between the weft. ends, such as actual tying, twisting Asithe shuttle becomes depletediy wellholder to cause unwinding of the weft from bobbln B as the latter moves into-the shed V Figs. 3,'4. andv5 are successive diagrambobbins of each pair are-tied together;v The bin B is tied to. the weftend E of the'cor f responding bobbin B so that the bobbins term knot as' used herein is intended to between the warps W, as shown in Fig. 3. The inclined wire guide 17 is so placed that as weaving continues the weft thread which extends from the remaining or lowest bobbin B will move thereover as the cloth advances, until it assumes the position shown in Fig. 4. In this position the hook 18 will lie behind and over the thread, so that asthe lowest bobbin B is transferred at a later period in the operation of the loom and is moved into the warp from the dotted to the full line position shown in Fig. 5, said hook will engage the threads which are tied together and prevent the knot 19 from entering the shed.

Cloth of the type in the weaving of which my invention is particularly. adaptable will ordinarily have very fine weft so that as the loom continues to run the loop of filling formed by the tied weft ends being attached to the selvage at two spaced points will break due to the resistance of the hook 18. If this mode of separating the weft ends from the hook be considered undesirable they may be cutin any approved manner.

It is expedient, though not necessary, to have the weft ends E and E of a length substantially not greater than their bobbins and if desired these ends may be inserted within the bobbins as set forth in my co-pending application Ser. No. 475,283. In any event, the length of the weft ends should be such that the knot 19 cannot be drawn into the warp when the first of a pair of bobbins is transferred. In other words, the distance between the knot 19 and that point on the wound mass of weft on the remaining bobbin to which the weft E is attached should be less than the distance from said point to the selvage. In this way assurance is given that the knot will not be drawn into the shed by bobbin B While I have shown the knot as being hetweenthe wound bobbin B and the selvage in Figs. 3 and 4, yet my invention can be practiced where for anyreason, after the knot has been tied, one of the weft ends is wound back on its bobbin until the knot is wound on said bobbin where it will be less likely to become undone if the mode of attachment is twisting.

The apparatus shown sets forth an approved manner of carrying my invention into eflect, but is merely illustrative and the method disclosed herein may be carried out by the use of devices other than those set forth herein without departing from the scope of the invention. Although the drawings show a magazine having a single point of delivery, yet the invention may be used on a double shuttle loom as contemplated in my aforesaid patent.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. The method of controlling weft ends in weft replenishing looms, which consists in providing two reserve bobbins with their ends tied together in a knot, transferring one bobbin and leaving the other to act as a thread holder with theknot lying between the selvage and said other bobbin, and subsequently transferring the other bobbin and producing a bend in the weft at a point nearer the knot than the selvage to prevent the knot from being drawn into the shed by said other bobbin. I

2. The method of controlling weft ends in weft replenishing looms, which consists in providing two reserve bobbins with their ends tied together in a knot, transferring one bobbin and leaving the other to act as a thread holderawith the knot lying between the selvage and said other bobbin, and subsequently transferring the otherbobbin and producing a bend in the weft at a point nearer the knot than the selvage to prevent the thread between the selvage and the other bobbin from being drawn into the shed by said other bobbin.

3. The method of controlling weft ends in weft replenishing looms, which consists in providing two reserve bobbins each with an extending weft end not substantially longer than the bobbin, uniting the weft ends in a knot, transferring one bobbin and leaving the other to act as a thread holder therefor with the knot lying between the selvage and the other bobbin, subsequently transferring the other bobbin and producing a bend in the weft at a point nearer the knot than the selvage to prevent that part of the weft between the knot and selvage and also the knot from being drawn into the shed by the other shuttle.

4. The method of controlling weft ends in weft replenishing looms, which consists in providing two reserve bobbins each with a weft end of less length than the distance between the selvage and the point at which the end is attached to the wound mass of weft on the bobbin, uniting the weft ends in a knot, transferring one bobbin and having the other to act as a thread holder therefor with the knotlying between the selvage and the other bobbin, subsequentlytransferring the other bobbin, and producing a bend in the weft at a point nearer the knot than the selvage to prevent the knot from being drawn into the shed with the other bobbin. 1

5. The method of controlling weft ends in weft replenishing looms, which consists in providing two reserve bobbins each with a weft end extending from its tip end, temporarily supporting the bobbins with their tip ends pointed away from the selvage,

transferring one bobbin and leaving the other to act as a thread holder therefor with the knot located between the selvage and the other bobbin, subsequently transferring the 5 other bobbin, and producing a bend in the Weft at a point nearer the knot than the selvage to prevent the knot from being drawn into the shed by the other bobbin.

6. The method of controlling weft ends in Weft replenishing looms, which consists in providing two reserve bobbins with their ends tied together in a knot, transferring one bobbin and leaving the other to act as a thread holder, and subsequently transferring 1 the other bobbin and producing a bend in the Weft at a point nearer the knot than the selvage to prevent the knot from being drawn into the shed by said other bobbin.

In testimony whereof I have hereunto affixed my signature.

RICHARD GREENLEAFVTURNER. 

